TCMT 16T304 dimensions
| Inscribed circle IC | 9.525 mm |
| Cutting edge length | 16.50 mm |
| Thickness s | 3.97 mm |
| Nose radius rε | 0.4 mm |
| Corner angle | 60° |
| Clearance angle | 7° |
| Tolerance M | IC ±0.05 · corner height ±0.08 · thickness ±0.13 mm |
| ANSI equivalent (inch) | TCMT 32.51 |
What TCMT 16T304 tells you on the shop floor
60° corner: general turning, three corners (six edges if double-sided negative); not as strong as C and W.
Positive insert (7°): lower cutting forces and less chatter. For finishing, boring, thin-walled parts and lighter machines.
Pressed, medium tolerance: economical, fine for roughing and where you do not need repeatability to a few hundredths of a mm at every insert change.
Small radius: lower forces and chatter, good finish at low feed.
Typical holders for TCMT
For a positive triangular 60° insert the most common ISO 5608 holders are:
- STGCR/L · lead angle 90°
- STFCR/L · lead angle 90°
The final R or L means right or left hand. Shank size, length and the exact clamping are in the manufacturer's catalogue.
Toolholders that take it
In inches, with the ANSI designation, the same insert is TCMT 32.51: size in eighths of an inch, thickness in sixteenths, radius in sixty-fourths. Converting any code, both ways, is in ISO Inserts Pro.
Other TCMT sizes
Same size, other version
Designation to ISO 1832; reference tables: Mitsubishi Materials turning catalogue (insert identification). Holders to ISO 5608. Chipbreaker, grade and cutting data differ between manufacturers: the catalogue of the insert you use is what counts.